| 摘要 |
<p>A system and method are disclosed for matching, or approximating, the impedance of an ADSL modem with the impedance of the associated loop by selectively switching in different impedances to improve or enhance ADSL performance in a variety of loop conditions. Using relays or multiplexers to actively switch in and out different impendance networks, the ADSL modem may select an impedance from a set of impedances (610, 612) that best matches the loop impedance. The different impedances may be switched singly or in combination with other impedances. Lastly, systems and methods are disclosed for using DSP measurement of the ADSL transmitter's (602) echo signal as the basis for determining hybrid impedance matching.</p> |
